package day07_collections_map.com.itheima.d6_map_impl;

import java.util.LinkedHashMap;
import java.util.LinkedHashSet;

public class MapTest2 {
    public static void main(String[] args) {
        LinkedHashMap<String, Integer> map = new LinkedHashMap<>();
        map.put("张三", 100);
        map.put("张三1", 99);


        map.put(null, null);
        System.out.println("map = " + map);
    }
}
